<template>
	<div class="list" ref="wrapper">
		<div>
			<div class="area">
				<div class="title border-bottom">当前城市</div>
				<div class="button-list">
					<div class="button-wrapper">
						<div class="button">{{this.currentCity}}</div>
					</div>
				</div>
			</div>
			<div class="area">
				<div class="title border-bottom">热门城市</div>
				<div class="button-list">
					<div class="button-wrapper" 
					@click="handleCityClick(item.name)"
					v-for="item of hot" 
					:key="item.id" 
					>
						<div class="button">{{item.name}}</div>
					</div>
					
				</div>
			</div>
			<div class="area" v-for="(item, key) of cities" :key="key" :ref="key">		
				<div class="title border-bottom">{{key}}</div>
				<div class="item-list">
					<div class="item border-bottom" v-for="innerItem of item" :key="innerItem.id" @click="handleCityClick(innerItem.name)">
						{{innerItem.name}}
					</div>
				</div>
			</div>
		</div>
	</div>
</template>

<script>
	import Bscroll from 'better-scroll'
	import { mapState, mapMutations } from 'vuex'
	export default{
		name: 'CityList',
		props: {
			hot: Array,
			cities: Object,
			letter: String
		},
		methods: {
			handleCityClick: function (city) {
				//this.$store.commit('changeCity',city)
				this.changeCity(city)
				this.$router.push('/')
			},
			...mapMutations(['changeCity'])
		}, 
		computed: {
			...mapState ({
				currentCity: 'city'
			})
		},
		watch: {
			letter () {
				if (this.letter) {
					const element = this.$refs[this.letter][0]
					this.scroll.scrollToElement(element)
				}
				console.log(this.letter)
			}
		},
		mounted () {
			this.scroll = new Bscroll(this.$refs.wrapper, { mouseWheel: true, click: true, tap: true })
		}
	}
	
</script>

<style scoped>
	.border-bottom{
		border-color: #ccc;
	}
	.title{
		line-height: .44rem;
		background: #eee;
		padding-left: .2rem;
		color: #666;
		font-size: .26rem;
	}
	.button-list{
		padding: .1rem .6rem .1rem .1rem;
		overflow: hidden;
	}
	.button-wrapper{
		width: 33.33%;
		float: left;
	}
	.button{
		text-align: center;
		margin: .1rem;
		border: .02rem solid #ccc;
		padding: .1rem 0;
		border-radius: .06rem
	}
	.item{
		line-height: .76rem;
		
		padding-left: .2rem;
	}
	.list{
		position: absolute;
		top: 1.48rem;
		left: 0;
		right: 0;
		bottom: 0;
		overflow: hidden;
	}
</style>